In "Gereint," Edern is the Sparrow-Hawk Knight whom Gereint must battle in order to free Enid's father's dukedom. In one legend, he was a knight of Arthur's court who was sent to fight three giants and died because Arthur was late to the battle. Another legend says that he was a bard who became a monk. Sadly, the truth of his godhood is obscured by diverging legends.

In French romance, it is said that Yder was one of the lovers of Queen Guenevere,* and that he killed a bear that entered her chamber while she slept. As "Arthur" means "bear"... Hmm.